NTFS is the file system used by Windows. It is a powerful and complicated file system. There are few file systems that provide as many features and to fully cover them all would require a book. And in fact there is a book detailing NTFS, and it's already out of date. The purpose of this article is not to cover all of the features of NTFS, nor will it exhaustively cover NTFS features in detail. Instead we will cover its basic structure and then describe some of its more advanced features and provide use examples where possible. We will focus more on what it does, rather than how it does it. Trying to walk the line between informative and detailed is difficult and so this article contains a lot of references for people who hunger for more detail.

I believe the table was saying not that DOS was written by billg but that FAT12 was, which is not something I can attest to but is reasonable.

Yes, Bill Gates wrote the original FAT12 implementation. FAT12 actually predates Tim Patterson's 86-DOS. FAT12 was implemented in Microsoft Disk BASIC-86 which he used for his S-100 micro that 86-DOS was built on, hence he used it for his file system.